Well, it's the day before school and I think I'm kind of screwed since I've barely finished more than half of my AP Physics homework...and I'm really not understanding a lot of the material. Help would be greatly appreciated. You drive a car 1200 m to the east, then 2400 m to the north. If the trip took 3.0 minutes, what was the magnitude and direction of your average velocity in m/s? I do have some materials in front of me, but I was never very good at math, and I've spent hours staring at the Vectors section, and I still have a very vague idea of what's going on. I would greatly appreciate it if someone would give me a small head-start to understanding the concept behind Vectors and such. Everything just seems to complicated to me. I also have another question via Kinematics. There is one question on my homework that reads: A lunar lander is making its descent to Moon Base 1. The lander descends slowly under the retro thrust of its descent engine. The engine is cut off when the lander is 4.0 m above the surface and has a downward speed of 1.5 m/s. With the engine off, the lander is in free fall. What is the speed of the lander just before it touches the surface? The acceleration due to gravity on the moon is 1.6 m/s^2." I realize that there are four equations to juggle with for Kinematics, and for this one, it is v^2 = v0^2 + 2a(x-x0). However, I'm not too clear on where to plug in the variables, and furthermore, I'm not too sure which situations are fit for which equation. I would greatly appreciate it if someone could help me out even a little bit.